Stave-jointing attachment for bed-planers



(No Model.)

J. GREIG.

STAVE JOINTING ATTACHMENT FOR BED .PLANER-S.

No. 375,153. Patented Dec. 20, 1887.

UNITED STATES PATENT OFFICEQ JOHN GREIG, OF SANTA CLARA, CALIFORNIA.

STAVE-JOINTING ATTACHMENT FOR BED-PLANERS.

SPECIFICATION forming part of Letters Patent No. 375,153, dated December 20 1887.

Application filed August 20, 1887. Serial No. 247,477. (No model.)

T0 at whom it TTI/G/Z/ concern.-

Be it known that 1, JOHN Game, of Santa Clara, Santa Clara county, State of California, have invented an Improvement in Stave- Jointing Attachments for Bed-Planers; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to stave'jointing attachments for wood-planers, commonly known as bed-planers, and it consists of guides attached 'upon each side, of the moving bed and so shaped that supports upon which the staves are clamped. will travel over these guides, thus raising and depressing the stave in such a manner as to give the proper curvature to the edges of the staves.

Referring to the accompanying drawing for a more complete explanation of my invention, the figure is a View showing a portion of a planer with my improvement attached.

A is the stationary portion of the planer.

B is the movable traveling bed, and G is the planer-head having the cutters attached thereto, and driven in the ordinary manner.

Upon each side of the moving bed are fixed the guides D, these guides being attached to the stationary portion, and their upper edges are inclined, so that they rise toward the center from each end. Upon the movable bed 0 are secured the bars E, having the clampingjaws F, between which the staves G are secured by means of screws H, so that the staves, being set upon edge and resting upon the bars E, are clamped in place. The ends of the bar E project beyond the sides of the planer-bed B, so that as the latter is caused to travel. beneath the cutter-head the ends of the bar E will travel up the inclined guides D, and will gradually raise the rear end of the staves as they pass beneath the cutters, thus giving the edge a curved outline. When it is desired to make the tank wider at the bottom than at the top, and to give it acurved as well as decreasing shape, but one of the bars E will project over the guides D, the forward one being made short, so as not to extend beyond the edges of the planer-bed. If, however,'it is desired to curve the stave, so as to make it narrower at each end, both bars E will project so as to travel upon the guides D, the highest portion of these guides being just beneath the cutterhead.

Vt hen the front end of the stave resting upon the front bar E reaches the cutters it will be at its highest point, and as this end moves downward upon the guides the stave will be enlarged toward the center, at which point the two bars E will rest upon the guides at points equidistant from the highest central portion, and will then be evenly raised above the bed B. The continued forward movement of the bed from this point raises the rear bar E, while the front one is depressed correspondingly, and the rear end of the stave will be narrowed from the center, thus making the staves of the proper shape to form a tank or cask tapering at both ends.

The guides D are jointed in the centcr,'and on the stationary part of the planer, contigu ons to said center, are adj usting-screws a and b, to raise or lower said guides at this point, and thus increase or decrease the taper or curve of the staves.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. In a stave-jointing attachment for planerbeds, the combination of jointed stationary guides secured upon each side and rising from each end of thebed toward the center at a point beneath theIoutterbar, the bars E, eX-

tending across the planer-bed and projecting over the guides, so as to rise and fall as the bed is moved forward or backward, and the clamps carried by said bars for holding the staves thereon, substantially as herein described.

2. The horizontally-traveling planer-bed Witnesses:

S. H. Nounsn, H. 0. LEE.. 

